Brandt



(No Model.)

F. HILDEBRANDT.

MACHINE FOR CLOSING THE BEADS 0P STOVE PIPE ELBOWS.

No. 247,348. Patented Sept. 20,1881.

WITNESSES: INVENTOR ATTQBNEY N. PETERS. PhMo-Liihographur. Wnshmgnm D. C,

UNITED STATES PATENT OFFICE.

FREDRIOK HILDEBRANDT, OF NEW YORK, N. Y.

, MACHINE FOR CLOSING THE BEADS OF STOVE-PIPE ELBOWS.

SPECIFICATION forming part of Letters Patent No. 247,348, dated September 20, 1881.

Application filed October 18, 1880. (N0 model.)

To all whom it may concern Be it known that I, FREDRIOK HLLDE- BRANDT, of the city, county, and State of New York, have invented certain new and useful Improvements in Machines for Closing the Beads of Stove-Pipe Elbows, of which the following is a specification.

The object of this invention is to furnish an improved machine by which the four or more piece stove-pipe elbows may be quickly and uniformly put together without requiring special skill, which is necessary in laying over or closing the beads by the common bead-closing machines. In these machines the sections are placed upon a mandrel and jointed by the rolls of the machines.

This invention consists of a lower stationary and an upper movable clamping-jaw, between which the head of two connected pieces or sections of a stove-pipe elbow is placed, the sections being at the same time securely forced against the lower stationary jaw by means of ahorizontally-slidingsegmentalfrontjaw. The upper clamping-jaw is then applied to the bead by means of a lever and treadle mechanism, so as to close the bead upon the lip or tongue of the connecting section in a uniform manner.

In the accompanying drawings, Figure 1 represents a top view of my improved mechanism for closing the beads of stove-pipe elbows; and Fig. 2 is a vertical longitudinal section of the same on line a: 00, Fig. 1.

Similar letters of reference indicate. corresponding parts.

Referring to the drawings, A represents the supporting-frame of my improved machine for closing the beads of stove-pipe elbows, and A the horizontal top plate or table of the same, which has a square or oblong opening, a, for the elbow. At the rear part of the opening a is arranged a stationary jaw, B, which is re cessed along its arc-shaped inner circumference, so as to form a seat for the connecting-bead of two adjoining sections of a stove-pipe elbow. A second movable jaw, B, is attached above the lower stationary jaw, B, to the end ofa fulcrumed lever, O, which is connected by a lever-rod, G, to a fulcrumed treadle-lever, D. A second segmental front jaw,E, is guided by a center plate, b, in rails 11 of the horizontal top plate, A, and actuated either by a separate hand-lever or preferably by means of a crankarrn, d which is keyed to a transverse shaft, 0, turning in bearings of frame A. This jaw operates to clamp and hold the elbow in position while the bead is being closed by the compressing-jaw. A second arm, d, is keyed to the same shaft and connected by a 'rod, d, with the treadle-lever, as shownin Fig. 2. The rod d passes through an eye, f, on the treadle-lever, and is provided with a nut, 9, above the lever and a nut, h, at its lower end. To the outer end of the shaft a lever-arm with an adjustable weight is applied, by which the return of the holding front jaw is facilitated, as soon as the pressure of the foot upon the treadle is released. Between the treadle-lever D and the lower end of the connecting-rod d aspring, i, is interposed. This spring affords an elastic connection between the rod and treadle, so that the clamping-jawEisbroughtintoyielding contact with the elbow, and will not indent the latter while the lever is being pressed down to operate the movable compressing-jaw. This spring also assists in returning the treadle-lever to its place after being pressed down.

To connect two adjoining sections of a stovepipe elbow, the sections arefirstput together by inserting the circumferential lips or tongues of one section into the circumferential beads of the adjoining section, the sections being then placed in position against the lower stationary jaw, B, and by pressing upon the treadle-lever held against the same by the clamping action of the sliding front jaw, as shown clearly in Fig. 2. By forcing the treadle-lever still fartherdown the movable jaw B is pressed downward upon the bead, so as to close the same over thelip ofthe othersection. Thestove-pipe ed. By releasing the treadle the frontjaw is retracted and the upper closing jaw raised, so that the stove-pipe elbow may be readily turned or removed as required.

By this machine the beads of the sections may be quickly closed and the stove-pipe elbows put together in a rapid and perfectly uniform manner, one joint being exactly like the other, without any of the imperfections and irregularities of the old-style bead-closing machines.

The speed with which the sections ofstovepipe elbows may thus be connected reduces the expense of the same, so that they can be furnished at: a lower price, While a neater and superior article in everyrespect is furnished.

Having thus described my invention, I claim as new and desire to secure by Letters Paten t 1. The combination of the horizontal sta tionary segmentaljaw, the horizontally-sliding clamping-jaw opposite the stationary jaw, the

vertically-moving segmental jaw above the sta tionary jaw, and connected mechanism operatin g the parts successively,whereby the elbow is clamped, the bead compressed, and the elbow released, substantially as described.

2. The combination of thejaws B B E, levers G and D, connectingmods 0 cl, springf, shaft 6, and crank-arms 01 (1 substantially as described. In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 13th day of October, 1880.

FREDRIOK HILDEBRANDT. Witnesses PAUL GoEPEL, CARL KARP. 

